noun, plural psis.
the 23rd letter of the Greek alphabet (Ψ, ψ).
the group of consonant sounds represented by this letter.
Origin of psi1
1350–1400; Middle English < Greek pseî
any purportedly psychic phenomenon, as psychokinesis, telepathy, clairvoyance, or the like.
Origin of psi2
shortening of psychic
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for psis
Historical Examples of psis
"You'd sure look silly if all the Psis in town blackballed you," I snarled at him.
"Nobody forced her to associate with a gang of Psis," he said.
Crescas appeared as if by magic—Psis act like that—and had me by the arm.
His black eyes had that lively watchfulness you associate with Psis.
Their attire, their homes, everything about Psis, seems tasteful.
British Dictionary definitions for psis
abbreviation for (in New Zealand)
Public Service Investment Society, New Zealand's largest credit union
the 23rd letter of the Greek alphabet (Ψ, ψ), a composite consonant, transliterated as ps
- paranormal or psychic phenomena collectively
- (as modifier)psi powers
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Word Origin and History for psis
23rd letter of the Greek alphabet. Use for "psychic force, paranormal phenomenon" dates from 1942 (probably from psychic (adj.)).
Online Etymology Dictionary, © 2010 Douglas Harper
The 23rd letter of the Greek alphabet.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.